I have created NSPredicate to search the string in my coredata.
so in this case does anyone know how to save the result [fetchRequest setPredicate:predicate]; in NSString.
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"name CONTAINS[cd] %#",
mytext];
[fetchRequest setPredicate:predicate];
Write Your Table Name in #"YOUR_ENTITY_NAME"
Make sure that your table contains name column
NSManagedObjectContext *managedObjectContext = [self managedObjectContext];
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] initWithEntityName:#"YOUR_ENTITY_NAME"];
[fetchRequest setPredicate:[NSPredicate predicateWithFormat:#"name CONTAINS[cd] %#", mytext]];
NSMutableArray *arrResult = [[managedObjectContext executeFetchRequest:fetchRequest error:nil] mutableCopy];
NSLog(#"%#", arrResult); //output
I think this will help you
NSArray *fetchedObjects;
NSManagedObjectContext *context = [self managedObjectContext];
NSFetchRequest *fetch = [[NSFetchRequest alloc] init];
NSEntityDescription *entityDescription = [NSEntityDescription entityForName:#"your entity" inManagedObjectContext: context];
[fetch setEntity:entityDescription];
[fetch setPredicate:[NSPredicate predicateWithFormat:#"name CONTAINS[cd] %#", mytext]];
NSError * error = nil;
fetchedObjects = [context executeFetchRequest:fetch error:&error];
if([fetchedObjects count] == 1)
NSLog(#"%#",[fetchedObjects objectAtIndex:0]);
Related
I have stored dictionary in the transformable attribute.I want to know
How to get single data from it?**
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc]
initWithEntityName:#"MemberProfile"];
NSSortDescriptor *ordering = [[NSSortDescriptor alloc] initWithKey:
[member.member_Profile objectForKey:"#order"] ascending:YES];
[fetchRequest setSortDescriptors:[NSArray
arrayWithObjects:ordering,nil]];
NSArray *result = [self.managedObjectContext
executeFetchRequest:fetchRequest error:Nil];
self.masterList = [[NSMutableArray alloc] initWithArray:result];
Import NSManagedObject(InstallProject) and fetch one object like this,
-(InstallProject *)readSelectedInstall:(NSString *)projIDString
{
NSArray *fetchedObjects;
NSManagedObjectContext *context = [self managedObjectContext];
NSFetchRequest *fetch = [[NSFetchRequest alloc] init];
NSEntityDescription *entityDescription = [NSEntityDescription entityForName:#"InstallProject" inManagedObjectContext: context];
[fetch setEntity:entityDescription];
[fetch setPredicate:[NSPredicate predicateWithFormat:#"(ANY ProjID contains[cd] %#)",projIDString]];
NSError * error = nil;
fetchedObjects = [context executeFetchRequest:fetch error:&error];
if([fetchedObjects count] == 1)
return [fetchedObjects objectAtIndex:0];
else
return nil;
}
I have created a an entity called Statutory with four columns namely name,complianceName,statMappingName,country
i want a get all complianceName names that matches a specific statMappingName. Following is my code
NSString *nameToGet = self.statNameArray[indexPath.row] ;
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"complianceName = %#", nameToGet];
[fetch setPredicate:predicate];
NSLog(#"n %#",predicate);
NSError *error = nil;
NSArray *results = [[self managedObjectContext] executeFetchRequest:fetch error:&error];
if(results) {
NSLog(#"Entities with that name: %#", results);
} else {
NSLog(#"Error: %#", error);
}
But it is not providing the compliance name specific to that statMappingName. How can I be able to get all complianceName that has a specific statMappingName?
Try this:-
NSString *firstName = statMappingName;
[fetchRequest setPredicate:[NSPredicate predicateWithFormat:#"firstName == %#", firstName]];
If you want to fetch specific column from core data
You can use the below method:-
NSEntityDescription *entity = [NSEntityDescription entityForName:entityname inManagedObjectContext:self.managedObjectContext];
NSFetchRequest *request = [[NSFetchRequest alloc] init];
[request setReturnsObjectsAsFaults:NO];
[request setEntity:entity];
[request setFetchLimit:1];
[request setPredicate:[NSPredicate predicateWithFormat:#"(complianceName LIKE %#)",nametoGet]];
NSError *error = nil;
NSMutableArray *tempDataArr = [[self.managedObjectContext executeFetchRequest:request error:&error] mutableCopy];
Note:-
*entityname: Your entity name
*self.managedObjectContext : Your managedobjectcontext
To Get All compliance Name use the below method
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] initWithEntityName:entityName];
[fetchRequest setReturnsObjectsAsFaults:NO];
NSMutableArray *tempDataArr =[NSMutableArray new];
[fetchRequest setPredicate:[NSPredicate predicateWithFormat:#"(ANY complianceName LIKE %#)",nametoGet]];
tempDataArr = [[self.managedObjectContext executeFetchRequest:fetchRequest error:nil] mutableCopy];
try these code for contains statMappingName
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"complianceName contains[c] %#", statMappingName];
I'm developing the app with UICollectionView.
It's collection of events arranged by date. I'm using NSFetchedResultsController to fetch data from DB. But I need to fetch current and future events + 2 past events.
For NSFetchRequest I'm using NSCompoundPredicate
NSPredicate *nextPredicate = [NSPredicate predicateWithFormat: #"startAt >= %#", [NSDate date]];
NSPredicate *previousPredicate = [NSPredicate predicateWithFormat:#"startAt < %#", [NSDate date]];
NSCompoundPredicate *resultPredicate = [NSCompoundPredicate andPredicateWithSubpredicates: #[nextPredicate, previuosPredicate]];
fetchRequest.predicate = resultPredicate;
And I have no idea how to limit previousPredicate to receive only 2 items.
If you know the date of current event than create a method that return date of the last event to fetch and then set the predicate on the main NSFetchRequest to that date.
-(NSDate *)dateOfPastEvent{
NSFetchRequest *request = [[NSFetchRequest alloc]init];
NSEntityDescription *entity = [NSEntityDescription entityForName:#"EntityName" inManagedObjectContext:_mainContext];
[request setEntity:entity];
NSSortDescriptor *sortDesc = [NSSortDescriptor sortDescriptorWithKey:#"startAt" ascending:NO];
[request setSortDescriptors:#[sortDesc]];
NSError *error = nil;
NSArray *array = [_mainContext executeFetchRequest:request error:&error];
__block NSDate *pastEventDate;
[array enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop){
if ([obj valueForKey:#"startAt"] == currentEventDate) {
if (array.count >= idx+2) {
pastEventDate = [[array objectAtIndex:idx+2] valueForKey:#"startAt"];
*stop = YES;
}
}
}];
return pastEventDate;
}
Now set the predicate for the above returned date
NSFetchRequest *requestForController = [[NSFetchRequest alloc]init];
NSEntityDescription *entity = [NSEntityDescription entityForName:#"EntityName" inManagedObjectContext:_mainContext];
[requestForController setEntity:entity];
NSPredicate *predicate = [NSPredicate predicateWithFormat: #"startAt >= %#", [self dateOfPastEvent]];
SQL Command
SELECT GAMELOCALTEAM FROM GAME WHERE GAMELOCALTEAM NOT IN ‘TBC’ ORDER
BY GAMELOCALTEAM
I would like to write sql command in objective c. My worte code below
NSManagedObjectContext * context = ((AFLAppDelegate *)[[UIApplication sharedApplication] delegate] ).managedObjectContext;
NSFetchRequest* fetch = [NSFetchRequest fetchRequestWithEntityName:#“game”];
NSEntityDescription *entity = [NSEntityDescription entityForName:#“game” inManagedObjectContext:context];
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"NOT(gamelocalteam IN 'tbc')"];
[fetch setPredicate:predicate];
NSSortDescriptor *sortDescreptor =[[NSSortDescriptor alloc]initWithKey:#"gamelocalteam" ascending:YES];
[fetch setSortDescriptors:[NSArray arrayWithObject:sortDescreptor]];
NSAttributeDescription* attributeDescription = [entity.attributesByName objectForKey:#"gamelocalteam"];
[fetch setPropertiesToFetch:[NSArray arrayWithObjects:attributeDescription, nil]];
[fetch setPropertiesToGroupBy:[NSArray arrayWithObject:attributeDescription]];
[fetch setResultType:NSDictionaryResultType];
NSError *error = nil;
_team = [context executeFetchRequest:fetch error:&error];
Predicate Format is #"NOT(gamelocalteam IN 'tbc') if this call app is crashing.
Is possible do NOT IN?
Try it
#"NOT gamelocalteam contains[cd] 'tbc'"
Code Below
NSManagedObjectContext * context = ((AFLAppDelegate *)[[UIApplication sharedApplication] delegate] ).managedObjectContext;
NSFetchRequest* fetch = [NSFetchRequest fetchRequestWithEntityName:#“game”];
NSEntityDescription *entity = [NSEntityDescription entityForName:#“game” inManagedObjectContext:context];
NSPredicate *predicate = [NSPredicate predicateWithFormat:>#"NOT gamelocalteam contains[cd] 'tbc'"];
[fetch setPredicate:predicate];
NSSortDescriptor *sortDescreptor =[[NSSortDescriptor alloc]initWithKey:#"gamelocalteam" ascending:YES];
[fetch setSortDescriptors:[NSArray arrayWithObject:sortDescreptor]];
NSAttributeDescription* attributeDescription = [entity.attributesByName objectForKey:#"gamelocalteam"];
[fetch setPropertiesToFetch:[NSArray arrayWithObjects:attributeDescription, nil]];
[fetch setPropertiesToGroupBy:[NSArray arrayWithObject:attributeDescription]];
[fetch setResultType:NSDictionaryResultType];
NSError *error = nil;
_team = [context executeFetchRequest:fetch error:&error];
Your predicate code will look like below,
NSPredicate* predicate = [NSPredicate predicateWithFormat:#"NOT (%K CONTAINS[c] %#)",#"someKey", [NSString stringWithFormat:#"Some String"]];
Thanks!
I'm trying to use the NSPredicate to only get specific objects. The problem is that all the objects are fetched and it should only be specific objects where the condition is correct.
- (void)fetchDevices {
// Fetch the devices from persistent data store
NSManagedObjectContext *managedObjectContext = [self managedObjectContext];
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] initWithEntityName:#"Songs"];
NSEntityDescription *entity = [NSEntityDescription entityForName:#"Songs" inManagedObjectContext:managedObjectContext];
[fetchRequest setEntity:entity];
// retrive the objects with a given value for a certain property
NSPredicate *predicate = [NSPredicate predicateWithFormat: #"selectedRow == %#" , selectedRowNumber];
devices = [[managedObjectContext executeFetchRequest:fetchRequest error:nil] mutableCopy];
[fetchRequest setPredicate:predicate];
}
The selectedRowNumber is an int declared in the .h file.
A look on my Songs entity:
PS. Please comment below if more information is required and i'll provide it.
You have to assign the predicate before executing the fetch request.
Also, if selectedRowNumber is an int then you have to use the %d format
instead of %#.
NSPredicate *predicate = [NSPredicate predicateWithFormat: #"selectedRow == %d" , selectedRowNumber];
[fetchRequest setPredicate:predicate];
devices = [[managedObjectContext executeFetchRequest:fetchRequest error:nil] mutableCopy];
Try this,
NSPredicate *predicate = [NSPredicate predicateWithFormat: #"selectedRow = %#" , [NSNumber numberWithInt: selectedRowNumber]];
[fetchRequest setPredicate:predicate];
devices = [[managedObjectContext executeFetchRequest:fetchRequest error:nil] mutableCopy];
there seems to be two problems.
I think you need to put [fetchRequest setPredicate:predicate]; before devices = [[managedObjectContext executeFetchRequest:fetchRequest error:nil] mutableCopy];
Also #"selectedRow == %d" seems not right. You may want to change it to #"selectedRow = %d"
And no need to set entity again.
So the code may look like this.
- (void)fetchDevices {
int selectedRowNumber = 1;
NSManagedObjectContext *managedObjectContext = [self managedObjectContext];
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] initWithEntityName:#"Songs"];
NSPredicate *predicate = [NSPredicate predicateWithFormat: #"selectedRow = %d" , selectedRowNumber];
[fetchRequest setPredicate:predicate];
NSArray *devices = [[managedObjectContext executeFetchRequest:fetchRequest error:nil] mutableCopy];
}
Let me know how it goes :)
There is no need of setting Entity using setEntity.
[fetchRequest setPredicate:predicate]
Just set predicate, it will work.
- (void)fetchDevices {
// Fetch the devices from persistent data store
NSManagedObjectContext *managedObjectContext = [self managedObjectContext];
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] initWithEntityName:#"Songs"];
// retrive the objects with a given value for a certain property
NSPredicate *predicate = [NSPredicate predicateWithFormat: #"selectedRow == %#" , selectedRowNumber];
[fetchRequest setPredicate:predicate];
devices = [[managedObjectContext executeFetchRequest:fetchRequest error:nil] mutableCopy];
[fetchRequest setPredicate:predicate];
}